问题
选择题
运用元素周期律分析下面的推断，其中错误的是 [ ]
A、铍（Be）的氧化物的水化物可能具有两性
B、砹（At）为有色固体；HAt不稳定；AgAt感光性很强，且不溶于水也不溶于稀酸
C、H2TeO4酸性弱于HBrO4
D、钋（Po）的氧化能力很稳定
答案
答案：D
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运用元素周期律分析下面的推断，其中错误的是 [ ]
A、铍（Be）的氧化物的水化物可能具有两性
B、砹（At）为有色固体；HAt不稳定；AgAt感光性很强，且不溶于水也不溶于稀酸
C、H2TeO4酸性弱于HBrO4
D、钋（Po）的氧化能力很稳定
答案：D
Jim gets up at half past seven. He has an egg and some milk breakfast. Then he begins to go to school. When he is on his way school, he is thinking, “ I tell my teacher that my mother is ill Monday. I tell him that my bike is broken on Tuesday. What do I today?” Jim thinks it over but he doesn’t a good idea. “May I come in?”says Jim at the door. “Oh, my boy.” says Mr White, “Please look at the on the wall. What time is it now?” “It’s ten past eight,” says Jim. Mr White is not . “You are late class three times this week. If all the students are like you, the clock is no use,I think.” “You are , Mr White”, says Jim. “If we don’t have the clock, do you know I am late for class?”
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